Project Info
Project: FSE215 Tpl Skärholmen
Location: Stockholm, Sweden
Method: Round and open-cut
Tunnel length: 160 m & 130 m
Project Owner: Trafikverket
Construction Company: Comsa
Forming operation: 2019 to 2023
Products & Services: Framed formwork Frami and Framax, Large-area formwork Top 50, Heavy-duty supporting system SL-1, Load-bearing tower, Timber-beam floor formwork Dokaflex, Edge protection system XP
Services: Planning, BIM, On-site service, Pre-assembly service

Whenever people talk about the quality of life, Stockholm is at the top of the list. To keep it at the top, the city is digging deep. A new superhighway, mostly designed as a tunnel, is intended to guide traffic around the city – with help from Doka. It is a double-first for the formwork experts from the Swedish branch.

Stockholm BypassDoka in action: Special projects, such as the Skärholmen tunnel in Sweden, require special solutions. Copyright: Doka
Stockholm is growing. Faster than London and faster than any other European city. But when it comes to traffic, the Swedish city is at a standstill. The frequently congested Essingeleden, the Sixties-era motorway in the west of the city, is still the most important north-south connection.

But traffic is soon set to flow again. For years, construction has been underway on a new road, the Förbifart Stockholm, better known as the Stockholm Bypass. The Trafikverket, Sweden’s traffic authority, has commissioned the excavation of a tunnel project under the rugged land of skerries and holms to the west of the metropolitan region for this project. A mega project. And a feat of strength too, as a good 18 kilometres of the 21-kilometre route run through the rocky underground.

Special solutions for special projects
Special projects require special solutions. It’s no coincidence that the “A-team” of Spaniards, Poles and Austrians also includes representatives from the local Doka branch, who have applied their expertise in formwork at various points of the western bypass. The main focus of their work has been two circular tunnels in the Skärholmen district, southwest of the city centre, built using the open-cut method, each 130 and 160 metres long.

The Swedish team broke new ground by working on this tunnel type. Yet, in actual fact, the project only reflects why Doka is a highly sought partner for formwork in large construction projects, no matter how unique the typology. The engineers’ secret to success: adapt proven systems with special elements to on-site circumstances in such a way that concreting feels like a revelation.

The underground railway concept for cars
An example of this is using the SL-1 all-round model structure to create an SL-1 “model Stockholm bypass” structure. Because the construction of the route did not involve just any kind of tunnel – these were circular tunnels, like the ones you find in underground railways. So the team around Doka Project Manager Håkan Bratt adjusted the system and took it from the world of rail travel to the world of road travel. According to him, the local contractor Comsa received an economical rental solution intended to implement a tunnel format of this kind without complications.

Of course, a design like this depends on more than just a few additional structures. Because maximising every solution to make formworking quick and easy is just as important as delivering the best solution. “We are very satisfied with the support we have received from Doka, especially Håkan Bratt and Lukas Palme. They came up with constructive ideas, always trying to optimize the solutions. They helped us to plan the formwork cycles so we were able to stay on schedule”, says Martin Klimt, Blockmanager for concrete/formwork at Comsa.

Efficiency every step of the way
But how can the formwork be quickly converted and easily moved from one place to the other? Wheels and winches provide the necessary mobility for the systems, while an on-site service for precise cutting of wooden formwork beams shortens working distances. Processes are optimised and streamlined for efficiency wherever possible.

Take material use, for example: Instead of keeping two or three spares of each of the parts, their use is timed so that the construction company can manage with less material without experiencing shortages. Or safety: Here, the Edge protection system XP was chosen. “It is user-friendly and can be used universally for all edge pro¬tection needs,” explains Lukas Palme, Group Leader Engineering, Doka Sweden.

An invaluable benefit, especially since the Swedish Doka branch has been entrusted with several construction sections. As well as the two circular tunnels, including entrances and exits, the work includes two 20-metre-long routes in rocky terrain as well as a pair of trough structures, the expansion of existing infrastructure and numerous stabilisation measures along the route.

A matter of form
As well as identifying the perfect solution and getting the most out of it, at least one more question is on the minds of the formwork specialists: How to position the system to make pouring concrete a piece of cake. And how Sweden’s first round road tunnel is not just a matter of form. At Doka, it is always about combining functions and innovations. About a modular system that does not only generate hardware solutions but other solutions as well. In Skärholmen the team has once again demonstrated how valuable an all-round service that is firmly embedded in Doka’s value system can be.

BIM as a “digital campfire”
Cue BIM: “We surprised Comsa with a 3D model on our initiative,” explains Jan Radlbauer, Head of Engineering Europe. Since the more complex the geometry, the more important it is to fully map the building space. Doka also drew the underlying model so that the customer could visualise it.

The benefits are clear. All employees are connected via their mobile devices and therefore are always up-to-date when construction data changes or an update is available. Problems are evaluated more quickly and errors rectified more easily than if everyone had to be individually briefed on the vast construction site.

BIM 360 and the design software Revit helped visualise the challenging tunnel geometries down to the smallest detail, especially the formwork constructions. When different countries are involved, data and sketches help everyone understand what’s going on. And participation means understanding. BIM is a digital bonfire at which project partners warm up every day for their tasks and discuss all manner of issues surrounding the tunnel construction.

“The BIM model was great and helped us to plan the works before execution since it gave us a unique possibility to see how everything will look in reality. This is very helpful when it comes to production and crane planning. When you combine the knowledge from a professional formwork supplier like Doka, an experienced subcontractor and our expertise the result becomes great,” says Martin Klimt, Blockmanager for concrete/formwork at Comsa.

Six construction sections, one big goal
Why, for example, a particular load-bearing tower or large-area formwork is used, or why fewer system parts are sometimes more. Every tunnel is different, at most similar only to itself. This means that experience does not mean resting on one’s laurels but is part of a continuous learning process. Because there is always something new you can learn, a goal you can strive for.

And this is how projects like the one in Sweden come into being; the country’s first circular road tunnels in open-cut construction are now taking off around Stockholm; on top of that, it’s another first for the Swedish Doka team, projected in BIM.
A company of the 150-year-old Umdasch Group, Doka is positioned as a world leader in providing innovative formwork, solutions, and services in all areas of construction, including scaffolding for a varied spectrum of applications. With more than 160 sales and logistics facilities in over 60 countries, Doka has a high-performing distribution network for customer service and technical support.

As things stand, the six sections involving Doka will be handed over to the client on time and within budget after roughly five years of planning and construction. When the junctions between Kungens kurva in the south and Häggvik in the north are approved for traffic, as is due to happen from 2025, the Stockholm Bypass will be one of the three longest road tunnels in the world. And Stockholm will continue to be one of the best places to live in.
Click Here
To Know More or to Contact the Manufacturer
Please let us know your name.
Invalid Input
Please let us know your Designation.
Please let us know your Contact Number.
Please let us know your email address.
Please brief your query.
Our other Value-Added Services:

To receive updates through e-mail on Products, New Technologies & Equipment, please select the Product Category(s) you are interested in and click 'Submit'. This will help you save time plus you will get the best price quotations from many manufacturers, which you can then evaluate and negotiate.

Invalid Input
Invalid Input
Invalid Input
Demand fundamentals for foundation and piling equipment remain firm, led by development of large-scale transportation infrastructure projects. However, actual acquisition of machineries remains volatile due to a range of techno commercial factors. To drive sales

Read more ...

Sharp Ply (India) in association with Mywood, Germany is positioned as a strong player in the formwork market. The company has been dealing with H20 Beams (EN13377 Certified) since 2016 and is also importing H16 Beams to meet the requirements at project sites

Read more ...

We offer complete scaffolding, staging, and shuttering solutions in steel. Having established a strong base in the western region, we now plan to expand to other parts of the country. When it comes to formwork, there is no one size that fits all. The design varies from

Read more ...

India’s top shuttering plywood brand ALLIANCE manufactured by Sunrise Panels, is a high value product and especially designed for use in high quality construction work. Due to its superior performance, ALLIANCE is highly

Read more ...

Constructed over the Karakaya Dam Lake, the Kömürhan Bridge will soon forge part of the Malatya-Elazig State highway in Eastern Turkey. Measuring 600 metres in length, the bridge features a cable-stayed design with a single pylon

Read more ...

Sharp Ply, known for its innovations, has unveiled ECP doors and window frames based on the concept of WPC (wood & PVC composites), which has the advantages of both the materials. Engineered Composite Profile (ECP) is a unique

Read more ...

Modern Scaffolding systems are witnessing rapid strides as their faster erection and dismantling, safety features, and quicker maintenance are enabling timely project execution, so much so that the traditional timber and bamboo

Read more ...

With the new headquarters of VakifBank, Istanbul is now in the process of becoming a financial capital. Covering a total area of 690,000 m² with 257,464m² of usable area, the office construction will be one of the most spectacular

Read more ...

For more than 70 years, the Layher name has been synonymous with high-quality and practically tested scaffolding systems. The Layher brand is present worldwide with more than 30 sales subsidiaries. Layher products are used

Read more ...

With both the national Vision 2030 and the FIFA World Cup 2022, Qatar isn't short of reasons to ensure its national infrastructure is delivered. Furthermore, to showcase itself as a sustainable and technologically advanced

Read more ...

Sunrise Plywood Industries, established in 2004, is considered a pioneer in the field of Film Face Shuttering Plywood. For the last 15 years, the company has been in the line of production for the Construction sector only. In 2017

Read more ...

Sharp Ply (India) Pvt Ltd. in association with Mywood has launched a new product line - H16 in the formwork beam segment for the Indian market. The new H16 is compliant with European norms and is set to counter indigenous competition

Read more ...

Nav Nirman, with its expertise of over 15 years in the field of Formwork, has introduced the (only) Made in India Neo Alumax and Neo, which are amongst the most advanced and versatile systems for all types of vertical structures

Read more ...

The Aglaya high-rise building is situated in the so-called Suurstoffi area in Risch Rotkreuz (Switzerland) next to Lake Zug. In a unique way, it combines the increasing desire of living in a green environment with careful

Read more ...

The Hamburg Port Authority (HAP), the agency responsible for the infrastructure of the Port of Hamburg, wants to improve the flow of traffic across the Süderelbe River by building the New Kattwyk Railway Bridge.

Read more ...

The Aglaya high-rise building is situated in the so-called Suurstoffi area in Risch Rotkreuz next to Lake Zug. In a unique way, it combines the increasing desire of living in a green environment with careful management of building

Read more ...

A long-established construction company 'Averbeck Bau' in the Münster region has been contracted by the Order of the Sisters of Divine Providence in Münster to build, according to plans from the architects Klein, Riesenbeck

Read more ...

Shandong Fangyuan Building Materials Co Ltd. of China is offering Square Circle Formwork® for forming concrete easily and fast. The revolutionary product is designed and developed to save time and create higher values. Square

Read more ...

Scaffolding and formwork manufacturer Doka is leveraging its business in India with advanced products and technical support capabilities. The company is a world leader in designing, manufacturing and supplying

Read more ...

×
Sign-up for Free Subscription
'India Construction Week'
Weekly e-Newsletter on Construction Industry
Get the latest news, product launches, projects announced / awarded, government policies, investments, and expert views.
Click here to subscribe.